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Long term complications of concussion include:

  • Post-concussion syndrome. This is a condition in which you experience concussion symptoms for weeks or even months (instead of days) after experiencing a concussion. Such symptoms may include ongoing dizziness/spinning, headache, memory and concentration problems, mood swings, depression, anxiety, irritability, personality changes, insomnia (can’t sleep) and excessive drowsiness.
  • Higher risk of anxiety and depression (especially if there’s been multiple concussions).
  • Structural brain injuries from multiple concussions. People who have had several head injuries in their life are at higher risk of long-lasting impairment. Chronic traumatic encephalopathy is one example of a brain condition linked to repeated blows to the head.
  • Problems with memory, naming and word-finding.
  • Dementia.

Anyone who has symptoms that won’t go away or that are worsening seen be seen by their healthcare provider.


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